/* Categories of Unicode characters.
   Copyright (C) 2002, 2006-2007, 2011-2021 Free Software Foundation, Inc.
   Written by Bruno Haible <bruno@clisp.org>, 2002.

   This program is free software: you can redistribute it and/or modify it
   under the terms of the GNU Lesser General Public License as published
   by the Free Software Foundation; either version 3 of the License, or
   (at your option) any later version.

   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
   Lesser General Public License for more details.

   You should have received a copy of the GNU Lesser General Public License
   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */

#include <config.h>

/* Specification.  */
#include "unictype.h"

#include <stdlib.h>
#include <string.h>

/* Indices stored in the 'struct named_category' elements of the perfect hash
   table.  We don't use uc_general_category_t values or their addresses
   directly, because this would introduce load-time relocations.  */
enum
{
  UC_CATEGORY_INDEX_L,
  UC_CATEGORY_INDEX_LC,
  UC_CATEGORY_INDEX_Lu,
  UC_CATEGORY_INDEX_Ll,
  UC_CATEGORY_INDEX_Lt,
  UC_CATEGORY_INDEX_Lm,
  UC_CATEGORY_INDEX_Lo,
  UC_CATEGORY_INDEX_M,
  UC_CATEGORY_INDEX_Mn,
  UC_CATEGORY_INDEX_Mc,
  UC_CATEGORY_INDEX_Me,
  UC_CATEGORY_INDEX_N,
  UC_CATEGORY_INDEX_Nd,
  UC_CATEGORY_INDEX_Nl,
  UC_CATEGORY_INDEX_No,
  UC_CATEGORY_INDEX_P,
  UC_CATEGORY_INDEX_Pc,
  UC_CATEGORY_INDEX_Pd,
  UC_CATEGORY_INDEX_Ps,
  UC_CATEGORY_INDEX_Pe,
  UC_CATEGORY_INDEX_Pi,
  UC_CATEGORY_INDEX_Pf,
  UC_CATEGORY_INDEX_Po,
  UC_CATEGORY_INDEX_S,
  UC_CATEGORY_INDEX_Sm,
  UC_CATEGORY_INDEX_Sc,
  UC_CATEGORY_INDEX_Sk,
  UC_CATEGORY_INDEX_So,
  UC_CATEGORY_INDEX_Z,
  UC_CATEGORY_INDEX_Zs,
  UC_CATEGORY_INDEX_Zl,
  UC_CATEGORY_INDEX_Zp,
  UC_CATEGORY_INDEX_C,
  UC_CATEGORY_INDEX_Cc,
  UC_CATEGORY_INDEX_Cf,
  UC_CATEGORY_INDEX_Cs,
  UC_CATEGORY_INDEX_Co,
  UC_CATEGORY_INDEX_Cn
};

#include "unictype/categ_byname.h"

uc_general_category_t
uc_general_category_byname (const char *category_name)
{
  size_t len;

  len = strlen (category_name);
  if (len <= MAX_WORD_LENGTH)
    {
      char buf[MAX_WORD_LENGTH + 1];
      const struct named_category *found;

      /* Copy category_name into buf, converting '_' and '-' to ' '.  */
      {
        const char *p = category_name;
        char *q = buf;

        for (;; p++, q++)
          {
            char c = *p;

            if (c == '_' || c == '-')
              c = ' ';
            *q = c;
            if (c == '\0')
              break;
          }
      }
      /* Here q == buf + len.  */

      /* Do a hash table lookup, with case-insensitive comparison.  */
      found = uc_general_category_lookup (buf, len);
      if (found != NULL)
        /* Use a 'switch' statement here, because a table would introduce
           load-time relocations.  */
        switch (found->category_index)
          {
          case UC_CATEGORY_INDEX_L:
            return UC_CATEGORY_L;
          case UC_CATEGORY_INDEX_LC:
            return UC_CATEGORY_LC;
          case UC_CATEGORY_INDEX_Lu:
            return UC_CATEGORY_Lu;
          case UC_CATEGORY_INDEX_Ll:
            return UC_CATEGORY_Ll;
          case UC_CATEGORY_INDEX_Lt:
            return UC_CATEGORY_Lt;
          case UC_CATEGORY_INDEX_Lm:
            return UC_CATEGORY_Lm;
          case UC_CATEGORY_INDEX_Lo:
            return UC_CATEGORY_Lo;
          case UC_CATEGORY_INDEX_M:
            return UC_CATEGORY_M;
          case UC_CATEGORY_INDEX_Mn:
            return UC_CATEGORY_Mn;
          case UC_CATEGORY_INDEX_Mc:
            return UC_CATEGORY_Mc;
          case UC_CATEGORY_INDEX_Me:
            return UC_CATEGORY_Me;
          case UC_CATEGORY_INDEX_N:
            return UC_CATEGORY_N;
          case UC_CATEGORY_INDEX_Nd:
            return UC_CATEGORY_Nd;
          case UC_CATEGORY_INDEX_Nl:
            return UC_CATEGORY_Nl;
          case UC_CATEGORY_INDEX_No:
            return UC_CATEGORY_No;
          case UC_CATEGORY_INDEX_P:
            return UC_CATEGORY_P;
          case UC_CATEGORY_INDEX_Pc:
            return UC_CATEGORY_Pc;
          case UC_CATEGORY_INDEX_Pd:
            return UC_CATEGORY_Pd;
          case UC_CATEGORY_INDEX_Ps:
            return UC_CATEGORY_Ps;
          case UC_CATEGORY_INDEX_Pe:
            return UC_CATEGORY_Pe;
          case UC_CATEGORY_INDEX_Pi:
            return UC_CATEGORY_Pi;
          case UC_CATEGORY_INDEX_Pf:
            return UC_CATEGORY_Pf;
          case UC_CATEGORY_INDEX_Po:
            return UC_CATEGORY_Po;
          case UC_CATEGORY_INDEX_S:
            return UC_CATEGORY_S;
          case UC_CATEGORY_INDEX_Sm:
            return UC_CATEGORY_Sm;
          case UC_CATEGORY_INDEX_Sc:
            return UC_CATEGORY_Sc;
          case UC_CATEGORY_INDEX_Sk:
            return UC_CATEGORY_Sk;
          case UC_CATEGORY_INDEX_So:
            return UC_CATEGORY_So;
          case UC_CATEGORY_INDEX_Z:
            return UC_CATEGORY_Z;
          case UC_CATEGORY_INDEX_Zs:
            return UC_CATEGORY_Zs;
          case UC_CATEGORY_INDEX_Zl:
            return UC_CATEGORY_Zl;
          case UC_CATEGORY_INDEX_Zp:
            return UC_CATEGORY_Zp;
          case UC_CATEGORY_INDEX_C:
            return UC_CATEGORY_C;
          case UC_CATEGORY_INDEX_Cc:
            return UC_CATEGORY_Cc;
          case UC_CATEGORY_INDEX_Cf:
            return UC_CATEGORY_Cf;
          case UC_CATEGORY_INDEX_Cs:
            return UC_CATEGORY_Cs;
          case UC_CATEGORY_INDEX_Co:
            return UC_CATEGORY_Co;
          case UC_CATEGORY_INDEX_Cn:
            return UC_CATEGORY_Cn;
          default:
            abort ();
          }
    }
  /* Invalid category name.  */
  return _UC_CATEGORY_NONE;
}
